Improvement in the manufacture of white lead



F. ALBERT.

Making White Lead. No. 23,815. Patented May 3, 1859.

AM. PHDTO-LITHlLCO. N.Y.(OSBORNE'S PROCESS) NITED STATES PATENT OFFICE.

FANNING ALBERT, OF BROOKLYN, NEW YORK.

Specification forming part of Letters Patent No. 23,815, dated May 3, 1859.

of Lead or \Vhite Lead and other Similar Substances; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanying drawings,rnaking a part of this specification,

in which-- Figure 1 is the plan; Fig. 2, asectional view; Fig. 3, an end View, and Fig. 4 represents auxiliary parts of the machine.

The red lines 0 represent a metallic or other cylinder to revolve slowly in the direction of the arrow, Fig. 3, over and Within the rectangular trough or tub B. This tub shall contain the supply of pulp or wet white lead of a height sufficient or more than sufficient to touch and attach itself to the lower periphcry of the cylinder, the pulp being of such consistency that the cylinder will receive a very thin coating of it. I introduce asufficient quantity of steam through the passage a in the shaft S, Fig. 2, within the cylinder to produce a required heat and carry off any superfluous steam or condensed water through the bent pipe 19, Figs. 2 and 3, at the opposite end into the passage 1), whence it escapes. I also introduce heat into the cap or heater H, Fig. 3, set over the top of the cylinder, for the purpose of assisting the evaporation of the water contained in the pulp. I can, however, either dispense with the heater or with the heat within the cylinder by giving a slower motion. As the white lead on the cylinder arrives at the scraper d it must be perfectly dry, and is there taken off by leatheror v. ooden scrapers set in iron clamps, the shaft to which the scrapers are attached having a reciprocating motion. (See Fig. 4, in which 6 andf are different views of the scraper, and 9 shows the manner in which the motion is given.) The dried white lead thus falls into the trough h in which is placed a spiral conveyer which conducts it to a point of deposit. In the bottom of the tub B is a reciprocating agitator for the purpose of keeping an even surface to the pulp and is driven by the arm 76.

The large cistern A is furnished with a revolving agitator, and is intended as a supply reservoir to B.

m n 0 are gearing through which motion is given to the different parts of the machine.

lVhat I claim as my invention, and desire to secure by Letters Patent, is-

The application of a rotating self-feeding cylinder for the drying of wet carbonate of lead, substantially in the manner within described.

FANNING ALBERT.

Ail-test:

JOHN S. HOLLINGSHEAD, WM. F. RUSSELL. 

